java模拟网银登录_用java编写模拟网上银行登录及存取款业务
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public class Account {
protected String accId;
protected String name;
protected double money;
public Account (String accId,String name){
this(accId,name,0);
}
public Account (String accId,String name,double money){
this.accId = accId;
this.name = name;
this.money = money;
}
public void saveMoney(double money){
if(money <= 0){
System.out.println("存款金額必e68a84e8a2ad3231313335323631343130323136353331333361303566須大于0");
}
this.money += money;
System.out.println("存款成功");
}
public double getMoney(double money){
if(money <= 0){
System.out.println("取款金額必須大于0");
return 0;
}
if(this.money <= money){
System.out.println("余額不足，無(wú)法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
public double getBalance(){
return this.money;
}
protected double getOverdraft(){
return 0;
}
// 實(shí)現(xiàn)了equals方法，list比較時(shí)才能正確
@Override
public boolean equals(Object obj) {
if(obj == null){
return false;
}
if(this == obj){
return true;
}
if(obj instanceof Account){
return this.accId.equals(((Account)obj).accId);
}
return false;
}
@Override
public String toString() {
return "賬戶=" + accId + ",名字=" + name + ",余額=" + money;
}
}
public class Bank {
// Account實(shí)現(xiàn)了equals方法，list查找時(shí)才能正確
private List usersAccounts;
public Bank() {
usersAccounts = new ArrayList();
}
public void addAccount(Account account) {
if (usersAccounts.contains(account)) {
System.out.println("添加失敗，不能添加同樣的賬戶");
return;
}
usersAccounts.add(account);
}
public boolean delAccount(Account account) {
return usersAccounts.remove(account);
}
public boolean delAccount(String accId) {
return delAccount(new Account(accId, null));
}
public boolean existAccount(Account account) {
return usersAccounts.contains(account);
}
public boolean existAccount(String accId) {
return existAccount(new Account(accId, null));
}
public Account getAccount(String accId){
return usersAccounts.get(usersAccounts.indexOf(new Account(accId, null)));
}
public double getAllMoney() {
// 不考慮是否溢出，只是把所有用戶余額相加
double result = 0;
for (Account account : usersAccounts) {
result += account.getBalance();
}
return result;
}
public double getAllOverdraft() {
// 不考慮是否溢出
double result = 0;
for (Account account : usersAccounts) {
result += account.getOverdraft();
}
return result;
}
public int getAccountNum() {
return usersAccounts.size();
}
public int getCreditAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
// instanceof 性能沒(méi)有簡(jiǎn)單的方法快。
if (account instanceof CreditAccount) {
num++;
}
}
return num;
}
public int getSavingAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
if (account instanceof SavingAccount) {
num++;
}
}
return num;
}
public List getAllAccount() {
return usersAccounts;
}
}
public class CreditAccount extends Account{
private double overdraft;
public CreditAccount(String accId,String name){
super(accId, name);
this.overdraft = 1000;
}
public CreditAccount(String accId,String name,double money){
this(accId, name,money,1000);
}
public CreditAccount(String accId,String name,double money,double overdraft){
super(accId, name,money);
this.overdraft = overdraft;
}
@Override
public double getMoney(double money) {
if(money <= 0){
System.out.println("取款金額必須大于0");
return 0;
}
if(this.money + overdraft <= money){
System.out.println("余額不足，無(wú)法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
@Override
public double getOverdraft(){
return overdraft;
}
@Override
public String toString() {
return "賬戶=" + accId + ",名字=" + name + ",余額=" + money + ",透支=" + overdraft;
}
}
public class SavingAccount extends Account {
public SavingAccount(String accId, String name) {
super(accId, name);
}
public SavingAccount(String accId, String name, double money) {
super(accId, name, money);
}
@Override
public double getMoney(double money) {
return super.getMoney(money);
}
@Override
public double getOverdraft() {
return super.getOverdraft();
}
}
public class Test {
private static Bank bank = new Bank();
public static void main(String[] args) {
Test.genAccount();
// 開(kāi)戶
Account a1 = new CreditAccount("1", "1", 200, 2000);
Account a2 = new SavingAccount("2", "2", 300);
Account a3 = new SavingAccount("3", "3", 400);
Account a4 = new CreditAccount("4", "4", 500, 2000);
Account a5 = new CreditAccount("4", "5", 600, 2000); // 帳號(hào)4重
bank.addAccount(a1);
bank.addAccount(a2);
bank.addAccount(a3);
bank.addAccount(a4);
bank.addAccount(a5);
showNowAccount();
// 銷(xiāo)戶
bank.delAccount("1");
bank.delAccount("2");
showNowAccount();
// 存款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
acc.saveMoney(100);
}
showNowAccount();
// 取款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
System.out.println("余額=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余額=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余額=" + acc.getBalance());
}
if(bank.existAccount("4")){
Account acc = bank.getAccount("4");
System.out.println("余額=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余額=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余額=" + acc.getBalance());
acc.getMoney(10000);
System.out.println("余額=" + acc.getBalance());
}
System.out.println(bank.getAccountNum());
System.out.println(bank.getAllMoney());
System.out.println(bank.getAllOverdraft());
System.out.println(bank.getCreditAccountNum());
System.out.println(bank.getSavingAccountNum());
}
public static void genAccount(){
String s = "1000 0000 0000 000";
Account a = null;
for(int i = 1; i < 11; i ++){
if((i & 2) == 0){
a = new CreditAccount(s + String.valueOf(i), "賬戶" + String.valueOf(i));
} else {
a = new SavingAccount(s + String.valueOf(i), "賬戶" + String.valueOf(i));
}
bank.addAccount(a);
}
}
public static void showNowAccount(){
for(Account account : bank.getAllAccount()){
System.out.println(account);
}
}
}
// 面向?qū)ο?#xff0c;看多寫(xiě)多了就會(huì)了，簡(jiǎn)單的隨便寫(xiě)的，有錯(cuò)誤先不用太糾結(jié)。
追問(wèn)
好像與題目要求不符啊
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